How do researchers prevent peptide quality issues from affecting experiments?

Hello everyone, I’m relatively new to peptide work and am concerned about how even minor impurities can compromise experiments. What strategies do experienced labs use to prevent peptide quality issues from affecting outcomes? Do you usually test each new batch in-house, or do you rely on independent analytical services? How do you document and track batches to ensure reproducibility? I’ve been looking at NeurogenResearch which offers independent HPLC and mass spectrometry verification with detailed reports. It seems like a helpful option for labs wanting to confirm peptide identity and purity before critical experiments.